Permissions for level files

I maintain rocks-n-diamonds. The game has a builtin level
creator. Up to now I have used a special group to allow
some users to edit levels and had the binary sgid games to
allow writing to the hiscore file.
Now I want to get rid of the group rocksndiamonds. This means
that all users will be able to edit the levels. Is this
acceptable?
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olet@ifi.uio.no [-: .elOle. :-] olet@debian.org